kunit: test.h: fix format string for ASSERT_NOT_ERR_OR_NULL

davidchiang@ pointed out the format string differs from

The latter correctly uses %s while this uses %ld, producing stuff like
> Asserted ptr is not error, but is: 1887632768
This was missed in 1304e037936b2 which added the strerror_r() call.

Fixing that, the two macros are again identical in all the ways we expect.

Change-Id: I8af8e5ba2770e92f8d4fe1967091256f2c74a252
Signed-off-by: Daniel Latypov <dlatypov@google.com>
1 file changed